Nice headache you got there.
Im reading the 107 install is DOA ? Due to trying to convert to SMF ? It was working before the convert attempt ? (note to self: Never let Thrash file the bug reports)
First off, your 107 'features'. The SMF converter wont do anything not forum related. So strip it down to just a 107 forum install.
IF that alone dont work... might be the 107 version. If as I type, i can only think of grinding - version update > convert attempt > versions update > and so on.
Im thinking trying to convert it to something else first, once stripped down, might be the best option. (looking into it, dont hold your breath)
or better yet. Archive the old forum, extracting all the data relating to members (usernames/login shit) and just starting fresh.